Since the Chiefs probably receive a 3rd round comp pick, your list will work with moving Jon Bostic up to a 3rd round comp pick and William Gholston to a 4th round pick.

I like the picks -

Matt Cassel replaced by Geno Smith
Dwayne Bowe replaced by Robert Woods. There are 2 or 3 other WRs that might also be considered with this 2nd pick.
The mistake Stanford Routt replaced by Rob Alford.
Javon Belcher replaced by Jon Bostic.
Glenn Dorsey replaced by William Gholston.

I think the next two picks you might want to consider replacements for G/C Ryan Lilja and QB Brady Quinn.